我制作了纯CSS3下拉菜单，并使用对象标记将文件插入到HTML文件中。问题是，当我将鼠标悬停在菜单上时，会出现一个滚动条。我希望菜单在悬停时重叠其下面的内容。
这是我的Javascript代码（忘了这部分）：
(function($) {
$.fn.menumaker = function(options) {
var cssmenu = $(this), settings = $.extend({
title: "Menu",
format: "dropdown",
sticky: false
}, options);
return this.each(function() {
cssmenu.prepend('<div id="menu-button">' + settings.title + '</div>');
$(this).find("#menu-button").on('click', function(){
$(this).toggleClass('menu-opened');
var mainmenu = $(this).next('ul');
if (mainmenu.hasClass('open')) {
mainmenu.hide().removeClass('open');
}
else {
mainmenu.show().addClass('open');
if (settings.format === "dropdown") {
mainmenu.find('ul').show();
}
}
});
cssmenu.find('li ul').parent().addClass('has-sub');
multiTg = function() {
cssmenu.find(".has-sub").prepend('<span class="submenu-button"></span>');
cssmenu.find('.submenu-button').on('click', function() {
$(this).toggleClass('submenu-opened');
if ($(this).siblings('ul').hasClass('open')) {
$(this).siblings('ul').removeClass('open').hide();
}
else {
$(this).siblings('ul').addClass('open').show();
}
});
};
if (settings.format === 'multitoggle') multiTg();
else cssmenu.addClass('dropdown');
if (settings.sticky === true) cssmenu.css('position', 'fixed');
resizeFix = function() {
if ($( window ).width() > 768) {
cssmenu.find('ul').show();
}
if ($(window).width() <= 768) {
cssmenu.find('ul').hide().removeClass('open');
}
};
resizeFix();
return $(window).on('resize', resizeFix);
});
};
})(jQuery);
(function($){
$(document).ready(function(){
$(document).ready(function() {
$("#cssmenu").menumaker({
title: "Menu",
format: "multitoggle"
});
$("#cssmenu").prepend("<div id='menu-line'></div>");
var foundActive = false, activeElement, linePosition = 0, menuLine = $("#cssmenu #menu-line"), lineWidth, defaultPosition, defaultWidth;
$("#cssmenu > ul > li").each(function() {
if ($(this).hasClass('active')) {
activeElement = $(this);
foundActive = true;
}
});
if (foundActive === false) {
activeElement = $("#cssmenu > ul > li").first();
}
defaultWidth = lineWidth = activeElement.width();
defaultPosition = linePosition = activeElement.position().left;
menuLine.css("width", lineWidth);
menuLine.css("left", linePosition);
$("#cssmenu > ul > li").hover(function() {
activeElement = $(this);
lineWidth = activeElement.width();
linePosition = activeElement.position().left;
menuLine.css("width", lineWidth);
menuLine.css("left", linePosition);
},
function() {
menuLine.css("left", defaultPosition);
menuLine.css("width", defaultWidth);
});
});
});
})(jQuery);
**Here is my CSS code (important!):**@import url(http://fonts.googleapis.com/css?family=Open+Sans);
#cssmenu,
#cssmenu ul,
#cssmenu ul li,
#cssmenu ul li a,
#cssmenu #menu-button {
margin: 0;
padding: 0;
border: 0;
list-style: none;
line-height: 1;
display: block;
position: relative;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
#cssmenu:after,
#cssmenu > ul:after {
content: ".";
display: block;
clear: both;
visibility: hidden;
line-height: 0;
height: 0;
}
#cssmenu #menu-button {
display: none;
}
#cssmenu {
width: auto;
font-family: 'Oxygen', sans-serif;
line-height: 1;
background: #83d99e;
overflow: hidden;
}
#menu-line {
position: absolute;
top: 0;
left: 0;
height: 3px;
background: #009ae1;
-webkit-transition: all 0.25s ease-out;
-moz-transition: all 0.25s ease-out;
-ms-transition: all 0.25s ease-out;
-o-transition: all 0.25s ease-out;
transition: all 0.25s ease-out;
}
#cssmenu > ul > li {
float: left;
}
#cssmenu.align-center > ul {
font-size: 0;
text-align: center;
}
#cssmenu.align-center > ul > li {
display: inline-block;
float: none;
}
#cssmenu.align-center ul ul {
text-align: left;
}
#cssmenu.align-right > ul > li {
float: right;
}
#cssmenu.align-right ul ul {
text-align: right;
}
#cssmenu > ul > li > a {
padding: 20px;
font-size: 13.1px;
text-decoration: none;
text-transform: uppercase;
color: #000;
-webkit-transition: color .2s ease;
-moz-transition: color .2s ease;
-ms-transition: color .2s ease;
-o-transition: color .2s ease;
transition: color .2s ease;
}
#cssmenu > ul > li:hover > a,
#cssmenu > ul > li.active > a {
color: #009ae1;
}
#cssmenu > ul > li.has-sub > a {
padding-right: 25px;
}
#cssmenu > ul > li.has-sub > a::after {
position: absolute;
top: 21px;
right: 10px;
width: 4px;
height: 4px;
border-bottom: 1px solid #000000;
border-right: 1px solid #000000;
content: "";
-webkit-transform: rotate(45deg);
-moz-transform: rotate(45deg);
-ms-transform: rotate(45deg);
-o-transform: rotate(45deg);
transform: rotate(45deg);
-webkit-transition: border-color 0.2s ease;
-moz-transition: border-color 0.2s ease;
-ms-transition: border-color 0.2s ease;
-o-transition: border-color 0.2s ease;
transition: border-color 0.2s ease;
}
#cssmenu > ul > li.has-sub:hover > a::after {
border-color: #009ae1;
}
#cssmenu ul ul {
position: absolute;
left: -9999px;
}
#cssmenu li:hover > ul {
left: auto;
}
#cssmenu.align-right li:hover > ul {
right: 0;
}
#cssmenu ul ul ul {
margin-left: 100%;
top: 0;
}
#cssmenu.align-right ul ul ul {
margin-left: 0;
margin-right: 100%;
}
#cssmenu ul ul li {
height: 0;
-webkit-transition: height .2s ease;
-moz-transition: height .2s ease;
-ms-transition: height .2s ease;
-o-transition: height .2s ease;
transition: height .2s ease;
}
#cssmenu ul li:hover > ul > li {
height: 32px;
}
#cssmenu ul ul li a {
padding: 10px 20px;
width: 160px;
font-size: 12px;
background: #333333;
text-decoration: none;
color: #dddddd;
-webkit-transition: color .2s ease;
-moz-transition: color .2s ease;
-ms-transition: color .2s ease;
-o-transition: color .2s ease;
transition: color .2s ease;
}
#cssmenu ul ul li:hover > a,
#cssmenu ul ul li a:hover {
color: #ffffff;
}
#cssmenu ul ul li.has-sub > a::after {
position: absolute;
top: 13px;
right: 10px;
width: 4px;
height: 4px;
border-bottom: 1px solid #dddddd;
border-right: 1px solid #dddddd;
content: "";
-webkit-transform: rotate(-45deg);
-moz-transform: rotate(-45deg);
-ms-transform: rotate(-45deg);
-o-transform: rotate(-45deg);
transform: rotate(-45deg);
-webkit-transition: border-color 0.2s ease;
-moz-transition: border-color 0.2s ease;
-ms-transition: border-color 0.2s ease;
-o-transition: border-color 0.2s ease;
transition: border-color 0.2s ease;
}
#cssmenu.align-right ul ul li.has-sub > a::after {
right: auto;
left: 10px;
border-bottom: 0;
border-right: 0;
border-top: 1px solid #dddddd;
border-left: 1px solid #dddddd;
}
#cssmenu ul ul li.has-sub:hover > a::after {
border-color: #ffffff;
}
@media all and (max-width: 768px), only screen and (-webkit-min-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (min--moz-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (-o-min-device-pixel-ratio: 2/1) and (max-width: 1024px), only screen and (min-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (min-resolution: 192dpi) and (max-width: 1024px), only screen and (min-resolution: 2dppx) and (max-width: 1024px) {
#cssmenu {
width: 100%;
}
#cssmenu ul {
width: 100%;
display: none;
}
#cssmenu.align-center > ul,
#cssmenu.align-right ul ul {
text-align: left;
}
#cssmenu ul li,
#cssmenu ul ul li,
#cssmenu ul li:hover > ul > li {
width: 100%;
height: auto;
border-top: 1px solid rgba(120, 120, 120, 0.15);
}
#cssmenu ul li a,
#cssmenu ul ul li a {
width: 100%;
}
#cssmenu > ul > li,
#cssmenu.align-center > ul > li,
#cssmenu.align-right > ul > li {
float: none;
display: block;
}
#cssmenu ul ul li a {
padding: 20px 20px 20px 30px;
font-size: 12px;
color: #000000;
background: none;
}
#cssmenu ul ul li:hover > a,
#cssmenu ul ul li a:hover {
color: #000000;
}
#cssmenu ul ul ul li a {
padding-left: 40px;
}
#cssmenu ul ul,
#cssmenu ul ul ul {
position: relative;
left: 0;
right: auto;
width: 100%;
margin: 0;
}
#cssmenu > ul > li.has-sub > a::after,
#cssmenu ul ul li.has-sub > a::after {
display: none;
}
#menu-line {
display: none;
}
#cssmenu #menu-button {
display: block;
padding: 20px;
color: #000000;
cursor: pointer;
font-size: 12px;
text-transform: uppercase;
}
#cssmenu #menu-button::after {
content: '';
position: absolute;
top: 20px;
right: 20px;
display: block;
width: 15px;
height: 2px;
background: #000000;
}
#cssmenu #menu-button::before {
content: '';
position: absolute;
top: 25px;
right: 20px;
display: block;
width: 15px;
height: 3px;
border-top: 2px solid #000000;
border-bottom: 2px solid #000000;
}
#cssmenu .submenu-button {
position: absolute;
z-index: 10;
right: 0;
top: 0;
display: block;
border-left: 1px solid rgba(120, 120, 120, 0.15);
height: 52px;
width: 52px;
cursor: pointer;
}
#cssmenu .submenu-button::after {
content: '';
position: absolute;
top: 21px;
left: 26px;
display: block;
width: 1px;
height: 11px;
background: #000000;
z-index: 99;
}
#cssmenu .submenu-button::before {
content: '';
position: absolute;
left: 21px;
top: 26px;
display: block;
width: 11px;
height: 1px;
background: #000000;
z-index: 99;
}
#cssmenu .submenu-button.submenu-opened:after {
display: none;
}
}
And here is my HTML:<!doctype html>
<html lang=''>
<head>
<meta charset='utf-8'>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="navStyle.css">
<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
<script src="navScript.js"></script>
<title>Navigation Panel</title>
</head>
<body>
<div id='cssmenu'>
<ul>
<li><a href='#'>Home</a></li>
<li class='has-sub'><a href='#'>Bases and Folds</a>
<ul>
<li class='has-sub'><a href='#'>Bases</a>
<ul>
<li> <a target="_top" href="http://petagami.com/basesfolds/square.html"> Square Base</a></li>
<li> <a target="_top" href="http://petagami.com/basesfolds/waterbomb.html"> Waterbomb Base </a></li>
<li> <a target="_top" href="http://petagami.com/basesfolds/kite.html"> Kite Base </a></li>
<li> <a target="_top" href="http://petagami.com/basesfolds/fish.html"> Fish Base </a></li>
<li> <a target="_top" href="http://petagami.com/basesfolds/frog.html"> Frog Base </a></li>
<li> <a target="_top" href="http://petagami.com/basesfolds/diamond.html"> Diamond Base </a></li>
</ul>
</li>
<li class='has-sub'><a href='#'>Folds</a>
<ul>
<li> <a target="_top" href="http://petagami.com/basesfolds/mountain.html"> Mountain Fold </a></li>
<li> <a target="_top" href="http://petagami.com/basesfolds/valley.html"> Valley Fold </a></li>
<li> <a target="_top" href="http://petagami.com/basesfolds/petal.html"> Petal Fold </a></li>
<li> <a target="_top" href="http://petagami.com/basesfolds/reverse.html"> Reverse Fold </a></li>
<li> <a target="_top" href="http://petagami.com/basesfolds/outreverse.html"> Oustide-Reverse Fold </a></li>
<li> <a target="_top" href="http://petagami.com/basesfolds/blintz.html"> Blintz Fold </a></li>
</ul>
</li>
</ul>
</li>
<li><a href="http://petagami.com/easy.html" target="_top"> Easy Origami </a></li><li>
<a href="http://petagami.com/modular.html" target="_top"> Modular Origami </a></li><li>
<a href="http://petagami.com/animals.html" target="_top"> Origami Animals <br> </a></li><li>
<a href="http://petagami.com/birds.html" target="_top"> Origami Birds </a></li><li>
<a href="http://petagami.com/index.html" target="_top"> Model Index </a></li><li>
<a href="http://petagami.com/tradtional.html" target="_top"> Traditional Origami </a></li><li>
<a href="http://petagami.com/marksym.html" target="_top"> Markings and Symbols </a></li><li>
</ul>
</div>
</body>
<html>
答案 0 :(得分：1)
将overflow: visible;提供给cssmenu